Internal combustion engine



April 4, 1939'. c L McNElL "2,153,470

INTERNAL COMBUSTION ENGINE Filed April 10, 1936 ENG/NE N0. ENG/IVE No.2

11 mg) 0)) ar og p$ III II 10w) (KM Gilli IN VEN TOR.

Char/es 1 Mc/Ve/Y Patented Apr.4,1939 2,153,470

UNITED STATES PATENT OFFICE INTERNAL COMBUSTION ENGINE Charles I. McNeil, Bloomfield, N. J., assignor to Eclipse Aviation Corporation, East Orange, N. J., a corporation of New Jersey Application April 10, 1936, Serial No. 73,800

2 Claims. (Cl. 609'7) This invention relates to internal combustion formation of cam ill, the currents pulsating engines and particularly to a plurality of such through the primaries 2|, 22 will be ninety degrees engines having a tendency to deviate from a out of phase with each other; and they will also desired common speed. produce-due to the Scott connections 21, 28-

An object of the invention is to provide means conventional three phase alternating current in 5 for maintaining one or more internal combustion the stator windings 3|, 32, 33, the frequency of engines at predetermined relative speeds. which will correspond exactly to the frequency A second object of the invention is to provide of the pulsations of current through rotor windin a system which includes a master engine and ing 36assuming the two engines to be operatone or more additional engines, means responsive ing at synchronous speeds.

to the rotation of said master engine to produce Should the speed of engine 5 deviate from that corresponding rotation of each of said additional of engine 5, there will be a resulting diilference engines. In this connection a feature of the inin frequency between the magnetic (torque provention is the provision of a motion differential ducing) peaks produced by the windings 3i, 32, device operating to vary the speed of each ad- 33 on the one hand, and those of the winding 36. 1| ditional engine in accordance with and in reand hence a departure from the normal, selfspouse to any variations in the speed of the canceling torque reactions. The result will be a master engine. turning of the rotor until the resultant shifting These and other objects and features of the inof throttle valve 31 alters the fuel consumption of m vention will become apparent upon consideration engine 6 sufilciently to restore the latter to synm of the following detailed description, and upon chronism with master en reference to the accompanying drawing illustrat- What I claim is: ing the preferred embodiment of the invention. 1. A Synchronize! for the D p Of a umit is to be understood, however, that the drawing en ine aircra t havin at leas two e es. e ch is illustrative only, and is not intended as a defiequ pped w t a rans o er and each constitutnition of the limits of the invention, reference bes he vin means for o e o e propel e s. ing had to the appended claims for u h a, d fl isaid synchronizer including, in addition to said tion of limit transformers, means for, sending pulsating cur- In the drawing the invention is h wn h rent through the primaries of said transformers,- inatically as applied to a, master engine 5 nd means for inductively associating the secondary one additional engine 5 a howing of th dcurrents of said transformers whereby there is ditlonal engines being considered unnecessary as produced electromagnetically a rotational moveit will be evident from the following description mBnt through an are o length Varying in F 90 how the invention is to b applied t such other tion to the difference in speeds of the two engines, additional engines to control said other engines a throttle nt l n u l admission to one of in the manner in which the engine 6 is herein said engines, and means fOI translating Said IOtfishown controlled, tional movement into a shifting of said throttle,

Each engine is shown equipped with d ti to an extent proportional to the arc of the rotae' arine" ii, I! to cause rotation of cams l3, i4, nal movement.

respectively, at rates proportional to the speeds M n Synchronizing the p s of W of the driving engines. The cams operate cirengines, one of which is equipped with a combuscuit closing switches 16, i1, and i8 to periodically t o egu a il and each Of which is q pp with connect the source I9 with the transformer prian engine driven periodic Circuit interrupter, S maries 2|, 22 and 23, respectively, having secondmeans comprising a dynamo electric machine, a aries 2t, 25 and 2c associated th rewith, th pair of transformers subject to said interrupters, windings it and 25 being Scott connected" as a current source for the primaries of said transindicated at t1 and 28 to provide currents one formers. mea for sending the currents s hundred twenty degrees out of phase in the thr erated in the secondaries of said transformers sections 35!, 3'2 and 33 of the three phase stator through the statonand rotor, respectively, of said winding of alternating current motor 34. Rotor y a o electric machine, produce movement 5 winding 36 of motor 34 is in circuit with the sec-' 0 the rotor 0f Said machine in proportion t he ondary winding 26 of the transformer whose pridegree of a y c between Said engines, mary circuit pulsations are controlled by switch and means for causin Sa d ove t o take l8 of engine t. effect upon said combustion regulator. 5 Due to the quadzuple and offset lobe formation 56 of cam I3, as contrasted with the double lobe CW5 Mfim 

